Choose the page of the questionnaire you want to edit in the dropdown box "page". The buttons have the following functions:

Add question: add a new question to the respective position

Add page break: add a page break to the respective position, the questionnaire will then have an extra page.

Delete: the question will be deleted.

Move to the previous page: the first question on a page can be moved to the previous page to form the last question on that page. If the question belongs to page 1 a new page will be added automatically.

Move to the next page: the last question on a page can be moved to the next page to form the first question on that page.

Copy: the question is copied, the new questions with identical contents will be placed on the same questionnaire page directly after the current question.

Edit question: here you can edit the question type, the answer options and all other question characteristics. You can find more details in the section "Edit question".